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Minerals

Naturally occurring substance that is solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and has an ordered atomic structure. It is different from a rock, which can be an aggregate of minerals or non-minerals, and does not have a specific chemical composition. The general definition of a mineral encompasses the following criteria: 1 - Naturally occurring 2 - Stable at room temperature 3 - Represented by a chemical formula 4 - Usually abiogenic 5 - Ordered atomic arrangement

Contributors in Minerals

Minerals

nosean

Geology; Minerals

Nosean, also known as Noselite, is a mineral of the feldspathoid group with formula: Na 8 Al 6 Si 6 O 24 (SO 4 ). It forms isometric crystals of variable color: white, grey, blue, green, to brown. It ...

nyerereite

Geology; Minerals

Nyerereite is a very rare sodium calcium carbonate mineral with formula Na 2 Ca(CO 3 ) 2 . It forms colorless, platey pseudohexagonal orthorhombic crystals that are typically twinned. It has a ...

pseudowollastonite

Geology; Minerals

Pseudowollastonite is a high-temperature polymorph of wollastonite. Its formula can be written as CaSiO 3 or as Ca 3 Si 3 O 9 . Other names include wollastonite 7T, ß-Wollastonite, and ...

abenakiite-(Ce)

Geology; Minerals

Abenakiite-(Ce) (or IMA 1991-054) is a mineral of sodium, cerium, neodymium, lanthanum, praseodymium, thorium, samarium, oxygen, sulfur, carbon, phosphorus, and silicon with a chemical formula Na 26 ...

annite

Geology; Minerals

Annite is a phyllosilicate mineral in the mica family. It has a chemical formula of KFe 3 2+ AlSi 3 O 10 (OH,F) 2 . Annite is the iron end member of the biotite mica group, the iron rich analogue of ...

dickite

Geology; Minerals

Dickite (Al 2 Si 2 O 5 (OH) 4 ) is a phyllosilicate clay mineral chemically composed of aluminium, silicon, hydrogen and oxygen contributing 20.90%, 21.76%, 1.56%, and 55.78% each respectively. It ...

alarsite

Geology; Minerals

Alarsite (AlAsO 4 ) is an aluminium arsenate mineral with its name derived from its composition: aluminium and arsenate. It occurs as brittle subhedral grains which exhibit trigonal symmetry. It has ...

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